Analysis of Ferro-resonance between Traction Electric Network and Locomotive

Research purposes:The fitting precision in the non-linear interval of magnetization curve can be improved to ensure the analysis precision of the over-voltage of ferro-resonance if the fitting exponential function is selected in the analysis and calculation of the ferro-resonance.It can provide the theoretic basis for analysis of the mechanism of generating ferro-resonance in traction electric network and finding the measures for eliminating the over-voltage of ferro-resonance. Research conclusions:The results of numerical calculation and analysis with the magnetization theory for the ferro-resonance show the saturated exciting induction exists in the iron-core induction.The saturated exciting induction is the main cause for generating the ferro-resonance and the frequency of the ferro-resonance is decided by the saturated exciting induction and the circuit capacitance.The over-voltage of ferro-resonance is producted when the harmonic voltage excites the circuit consisiting of the saturated induction and the capacitance.